The
Concrete Test Hammer / Hammer Test, suitable for rapid quality control
of concrete work is built on a scale pointer and graphics. Concrete Test
Hammer Tool To measure the compressive strength of concrete or hard to
know quickly and practically. Commonly used for Quality Control of work.
* Used for non-destructive measurement of concrete / mortar compressive
strength of concrete characteristics * Quality control of the uniform
(in-situ concrete and prefabricated structures) * Detection of weak
spots in the concrete.

This test uses a hammer impact testing of concrete surfaces, and then surveys the repulsion force

Test Hammer's Principal

NJ-80 hammer tests of high quality, the method is very simple and easy to survey the development of violence.

Survey Methods Hammer

- Palo has adapted to use ground before launch. mean adjusting
typically R = 80 ± 1, but the tolerance of R = 80 ± 2 was approved, but
the tolerance is* Discover the use of metal detectors iron rods and then void where an iron rod when you use a hammer.* Choose a plane* Avoid prominence and depression, fractures and gaps, pebble gravel, stone.* Remove the powder with a grinding stone.* Remove the stand and depression using a grinding stone.* Choose a place that is more than 10cm thick concrete. ii. measurement* Minimum 3 - 6cm away from the bars, the pillars* Size is 3cm by 3cm Hit the strike length of 5 times, in the high 4 times hit.* When the hammer hit, keeping the right ang* If you find a strange sound or damaged holes, ignoring the number, move to the next good point and try again